1. Heat: Heat provides the energy to cause the chemical reactions that transform the minerals within the rock. This heat can come from the Earth's interior (like near a magma chamber) or from friction caused by tectonic plate movement.
2. Pressure: Pressure squeezes the rock, causing the minerals to rearrange and recrystallize. This pressure can come from the weight of overlying rocks or from tectonic forces.
These two factors, heat and pressure, work together to change the texture and mineral composition of the original rock, creating a new metamorphic rock.
